Bring button to front in web browser control

There is a property named PlacementTarget, just set the button object into it.

Thank you so much!! Popup works great, can you tell me, how to show popup at my desired location.

I tried too. The problem is when the web browser control isn't loaded any pdf, the button is in front but as soon the document loade, it goes back. Isn't there any solution?

Make sure that it haven't any transparency color in your window alongwith right click on your button -> order -> BringToFront. Do let me know if it solves the problem